Dia (Atlassian)
The Browser Company's AI-native browser; Atlassian acquired The Browser Company for $610M cash (announced 2025-09, closed 2025-10-21). Stores summaries and preferences locally; opt-in @history feature references up to 7 days of browsing as context. History/chats/bookmarks encrypted local-first.
Acquired · Verified 2026-10-23 · fresh as of 2026-10-23 · 60 cited facts, 3 with a third-party source · 2 recorded changes · Suggest a correction
At a glance
- Type
- Local-first browser-history + @history queries vendor fix
- Tier
- T1
- Section
- Browser-agent memory
- Created
- 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassian Sept 4 2025 third-party fix
- Latest release
- not applicable — not OSS fix
- License
- not applicable — not OSS fix
- GitHub
- not applicable — no GitHub repo fix
- Pricing
- Free (no AI); paid AI tiers 'Better Answers' $20/mo (page also shows $10) and 'Better Days' $100/mo vendor fix
- Funding
- total $128M raised pre-acquisition; acquired by Atlassian for $610M cash (announced 2025-09, closed 2025-10-21) third-party fix
- Freshness
- 2026-10-23 fix
- Layer
- agent-infra repo fix
- Licensing
- commercial vendor fix
- Compliance
- soc2-type2 vendor fix
Memory taxonomy
- storage
- file
- retrieval
- extraction-pull
- persistence
- long-term
- update
- append-only
- unit
- episode
- governance
- user-controllable
- conflict
- none
When to use
Optimised for: local-first browser-history memory + @history queries
Anti-fit: not for non-Atlassian enterprise
Pros & cons
Pros
Skills + memory architecture explicitly modeled on how a knowledge worker re-uses repeated workflows.
Cons
Atlassian-tied product positioning narrows reach; skills require setup before memory is useful.
Claims & capabilities
$128M raised pre-acquisition; $610M Atlassian acquisition. Dia Pro $20/mo (Aug 2025).
Technical surface
- API surface
- searched not found
- Backend storage
- custom
- Deployment
- Managed-only
- Embedding model
- locked
- Multi-tenancy
- hard-isolation
- MCP
- Skills can wrap MCP servers via Atlassian Forge bridge; not native
- A2A
- searched not found
- OpenTelemetry
- searched not found
Compare Dia (Atlassian) with…
Alternatives to Dia (Atlassian) → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other browser-agent memory in the catalog, ranked by inbound references.
- Browserbase T1
Cloud browser infrastructure for AI agents. Headless Chromium sessions with persistent cookies, localStorage, session recording — agent workflows carry state across runs. Memory at the session/automation tier rather than conversational.
- Brave Leo T2
Privacy-focused integrated assistant. Memory is user-curated: explicit facts and preferences persist across all sessions, stored locally with no server retention. Agentic browsing experiment (Brave Nightly Dec 2025) takes multi-step actions inside sites referencing those preferences.
- Fellou T1
Silicon Valley. Spatial agentic browser with explicit Agentic Memory layer learning from history and notes for instant recall of past research sessions. Operates on logged-in accounts (Quora, X, etc.); runs tasks while user is idle.
- Microsoft Edge Copilot Mode + Journeys (now Copilot in Edge) T1
Copilot Mode retired 2026-05-13; its features now ship as Copilot in Edge. Journeys clusters browsing history into topic cards on the new tab page (desktop, and US mobile); Copilot long-term memory can reference past chats and browsing history with user controls; agentic 'Browse with Copilot' (formerly Copilot Actions) for US Microsoft 365 Premium.
- Opera AI (formerly Aria) T2
Memory feature stores user-declared preferences and facts; injected into future prompts. Understands current tab content; manages open tabs contextually. Memory off by default, end-user controlled, stored alongside the prompt rather than the LLM.
- Perplexity Comet T1
AI-native Chromium-based browser. Assistant operates across tabs and sessions; persistent memory of preferences; multi-step agentic tasks without leaving the browser. Memory is opt-in and server-side; enterprise memory tier separately available.
Sources (59 cited facts, 3 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Local-first browser-history + @history queries vendor
- What it does & what's distinct The Browser Company's AI-native browser; Atlassian acquired The Browser Company for $610… third-party
- Claims / benefits $128M raised pre-acquisition; $610M Atlassian acquisition. Dia Pro $20/mo (Aug 2025). vendor
- Modalities text + image vendor
- Created 2024-12 (announced); 2025-06 (beta); 2025-10 (public macOS launch); acquired by Atlassia… third-party
- Funding total $128M raised pre-acquisition; acquired by Atlassian for $610M cash (announced 2025… third-party
- Customers / scale 201-500 ppl Atlassian acquisition ($610M), enterprise customers unnamed post-acquisition vendor
- Pricing Free (no AI); paid AI tiers 'Better Answers' $20/mo (page also shows $10) and 'Better Da… vendor
- Compliance SOC 2 Type II; ISO 27001; ISO 27018; FedRAMP (Atlassian); GDPR-compliant vendor
- Data handling Never trains on customer data (Atlassian cloud policy) vendor
- Deployment Managed-only vendor
- HQ US vendor
- Founders / pedigree The Browser Company (founded Josh Miller ex-Union Square Ventures; and Hursh Agrawal) vendor
- Memory volume / scale internal — undisclosed vendor
- Backend storage custom vendor
- Multi-tenancy hard-isolation vendor
- Encryption at-rest + in-transit vendor
- SSO / RBAC SSO + RBAC vendor
- Embedding model locked vendor
- Consistency strong vendor
- Versioning immutable append-log vendor
- Tombstoning append-only no delete vendor
- Schema evolution free-form / no schema vendor
- Namespace primitives hierarchical vendor
- Contradiction handling always append (no resolution) vendor
- Forgetting policy user-controlled forget vendor
- MCP support Skills can wrap MCP servers via Atlassian Forge bridge; not native vendor
- Validated verticals consumer / individual + Atlassian enterprise (post-acquisition) vendor
- Time to running <10min (download Dia) vendor
- Anti-fit not for non-Atlassian enterprise vendor
- Optimised for local-first browser-history memory + @history queries vendor
- Adjacent infrastructure self-contained Dia vendor
- Pros Skills + memory architecture explicitly modeled on how a knowledge worker re-uses repeat… vendor
- Cons Atlassian-tied product positioning narrows reach; skills require setup before memory is … vendor
- Project & sources diabrowser.com vendor
- cost-token-budget no vendor
- cost-prompt-caching no vendor
- cost-semantic-caching no vendor
- cost-batching no vendor
- cost-model-routing no vendor
- cost-streaming-only no vendor
- cost-observability-cost-attribution no vendor
- eval-langsmith-evals no vendor
- eval-braintrust no vendor
- eval-weights-and-biases-agent no vendor
- eval-helicone-evals no vendor
- eval-custom-test-harness no vendor
- eval-human-loop no vendor
- eval-production-traffic-replay no vendor
- cost-input-usd-per-mtok 0 vendor
- cost-output-usd-per-mtok 0 vendor
- cost-tier free vendor
- cost-pricing-model free-tier vendor
- cost-last-verified 2026-06-29 vendor
- architecture-deployment-locus local vendor
- licensing-bucket commercial vendor
- positioning-platform-vs-product product vendor
- taxonomy-three-layer-rollup agent-infra repo
- compliance-certifications soc2-type2 vendor
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-23
- Funding / ownership “$128M total $610M val Acquisition · 2025-09” → “total $128M raised pre-acquisition; acquired by Atlassian for $610M cash (announced 2025-09, closed 2025-10-21)” source
- 2026-10-22
- Pricing “Free + paid” → “Free (no AI); paid AI tiers 'Better Answers' $20/mo (page also shows $10) and 'Better Days' $100/mo” source